Countersinkibrg-machilte



G. V. CURTIS.

COUNTEHSI'NKING MACHINE.

APrfLxcATxoN HLED JULY 24. 1911.

1 ,307,397. Patent@ rune 24, 1919.

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COUNTERSINKING MACHINE'.

APPLICATION FILED IuIv 24,I9Ir.

' Patented June 24, 1919.

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UNITED STATES PATENT GEORGE v. CURTIS, or SPRINGFIELD, MASSACHUSETTS,`ASSIGNOR To BAUSII MACHINE i .TOOL COMPANY, A CORPonATIoN OEMASSACHUSETTS.

COUNTEBSINKINGMACI-IINE.

Application filed .T uly 24, 1917. Serial No. 182,414. i

To all whom t may concern.' j y Be it known that I, GEORGEfV. CURTIS, acitizen of` the `'United States, `residing `in Springfield,lllassachusetts, `whose post/pince address is Baush Machine ToolCompany, Springiield, Massachusetts, have invented certain new anduseful` Improvements in Countersinking-Machines, of` which the folllowing is a specification.

My invention aims to` provide a machine for countersinking the innerendsoflioles in automobile wheel hubs `and similar pieces of work. Such hubsare of tubular sheet metal construction with holes drilled atin tervalsaroundl them either at right` angles to the axis or at an oblique angle`thereto. Generally two rows of Such holes are provided, those of one rowbeing,` "staggered` with relation to those olf the other. I-leretoitore, as far as I am informed the counter-j single Spindle machine,countersinking one hole at a time. Theniachine oflniy invention howeverCountersinks an entire rowof holes in one operation, andcombines alarge` output with accuracy and simplicity of op-` eration. Itinay'beadapted also toquickly. shift to position for countersinking a Sec-1 ondrow of holes, where liubs ofthis class y are to be made.

The accompanying drawings illustrate a y y n M Ithere `isa bracket Qcarrying at its upper machine embodying the invention.

Figure l `is a central"verticalseetion,` partly in elevation,offthecompleteUmar` y e n its Outer end, `and which is positioned sochine; Fig. ie Ilig. n Fig. 3 is afsection,` .ola centering device la isan enlarged detail of Fig. 1; l lb is an elevationof a detail;`

taken on the liiie`3-f3 of Fig. 2y; i

Fignl is a Sectionion `tlie"line Ofl Fig. 2;

Fig. 5 is a horizontal section on Qtheline 2 `is a plan of the completemachine; y y y proper registration of the countersinking i tools with1the drilled holes.` The work being thus centered on the blocks B andheld iii the correct angle by the plunger `R is have a vertical and anangular movement on the hollow head D of the frame of the inachiiie. yThe centering blocks B are provided with flanges E which enter and litwithin the holein the end of the hub;`tlie blocks being located within atop iange F ofthe earrierClw y A clamping ring Gr is located on top ofthe flange F of the carrier` and held in position, means ofthreebrackets H which are l fastened to the carrier by nieans of screws i Theclanipingring G fits around the..outer portion of the hub and may beclampedtightly thereon. `The ring is split as Shown ,the lower part ofFig. 2 and has anear K-pivotally connected to one end of `a link L, the`opposite end of which is pivoted to an arm M on a handlever N which in`turn is pivoted at O to an ear P on the oppositeendof the ring. i Thelilik L and arm Mthus constitute a toggle operated by the lever N forVclamping or` unclamping the ring The: ring tends to spring open. lViththe parte in the position of Figs. 4 and 5 however,-the toggle is swungslightly beyond itsdead center. and the ring is locked in a clampedposition. Byswinging the" handle around in thelfdirection of the arrow,the

ring may be "opened to withdrawtlie coni` pleted work and insert a newpiece. f

`Mountedon the flange F of the carrier end'a sliding plunger R which canbe pulled out oiipushed 11i by` means of a handle on as to enter one ofthe drilled holes in the hubAwhen the latter isturned at the correctangle and `to hold u it at this angle for "asf clamped by means `of thelever N in position y illustrated) have each fa key iitting into aspline, (Fig. la) ina hub of a pinion T so as te turn `with thefpinionand at the same time' be free to move lengthwise. The pinionshave hubs`elongated at both sidesolithe` toothed portion, and having an insidebear-` ing in the head D of the machine and having separate Outsidebearings in blocks U fastened on the head of the machine. The

several pinions T are driven by a common iie gear V having a conical hubW which is mounted on the top of the head of the machine and is keyed ona -central shaft V 'shaft Y, which carries fast and loose belt pulleys Zanc a respectively, driven by a belt Z) which is shifted .to one orthe-other of the pulleys by means of a belt shifter c.

The kinner ends of the tools S are 'rounded and bear in longitudinallslots in a earnl d; Nearthe inner end offeach tool is an anf nulargroote engaged by gibs 6, overhaiiging the grooves in the cam. The hub fof the cam has near its lower end traiisvei'se slots g in which areshoes pivoted .in the end of a hand lever 71. which is pivoted iii avertical slot in th'e up'pe'r part ofthe frain'e of the machine.lliodnted on the base 'f the vinabhi'ne is a bolt constituting anadjustable stop which is struck by the hand leverl fr and determines thelimit of the downward moyem'ent of the latter. By pushing the lever 'Itdownward the feed cam (l pushed upward., the `motion Continuing iliitilthe lever strikes the stop j', which indicates that the lco'untersinkinghasbeen carried to the desired depth. On releasing the handle the feed'cam drops andthe gibs 'retract theJ tools;-

The work carrier C is formed with an oblique y'slot 70 in wliich is ablock ,Z mounted on 'the' fixedfuppei1 'portion D ofthe fr arnel. The`"carrier :Chas a handle in', by turn-ing which the carrier and the workpiece are given an angular movement; the pin slot 7c Z 'serving at thesarie time to lower the lcarrier and the work with relation to thetoolsv so that vthe next rowv of holes may be countersunk. The carrier Chas also an ear 'nA adapted to strike 'against l'one or the other ofthe. adjustable' "stops A0` and p which are mounted n the fixed head ofthe machine, and which are set for ythe angular movement necessary toproduce the staggeriiigof the holes in the two rows. y y l'n thelowerpart of the head of the lInachine is a screw g which holds the feedcam up and 'which can lbe unscrewfed to allow the 'caint'o drp asiiiiicient distance .for the vref leasing'of the t'ools.;v Thelclarrping ring then be lifted by detaching the clamps H whicharefastened lonly by khuiled screws.

The tools may then be withdrawn foigrinding or renewal. l

The machine is designed to beinounted `on a bench 1'@ and attached bymeans of bolts s which also hold an 'oil tank t suspended unc'piesjof'tiis patent may te obtained for der the bench. An oil pump indicated inoutline (since it constitutes no part of this invention) iat u is drivenfrom a pulley u on the driviirjf` shaft Y and supplies lubricant tothetool whence it runs down through 'suitable openings in the horizontalportions of the frame to the tank t. In operation, the werk. is iirstlcentered then turned to the correctangular position and clamped andlowered by turning the handle M in the direction indicated by the arrowin Fig. 2. The belt `is .shifted to the fixed driving' pulley and thefeed lever 7L depressed until 1t strikes its limit-ing stop. rThis leveris lthen rcleased aiid the lever in turned in the opposite Jdirection soas to' raise the work. While this lever is sdheld the lever 7L is againpressed dwn 'until it reaches its limit and then released. Thisc'o'iiipletes the work and, by unclainping, it is easily withdrawn and anew piece' inserted;

Tlitugh l. have' described with great particiilaiityin detail a certainembodiment 0f my iiivetibii', yet it is not to be understood therefromthat the invention is restricted to the particular embodiment disclosed.Varioiis mditi'catins thereof in detail and in the arrangement of theparts may be made by those skilled in the art without departingfrein-the invention as dehned in the following claim. p

In a machine forcountersinking holes in wheel hubs or the like, anupright hollow cylindrical supprting frame, a work carriei* mounted forboth rotary and axial movement on said supporting frame, said workcarrier being formed with a. slot ai'- raiige'd to 'coa'ct with a blockcarried by said supporting frame whereby a rotary move ment-f theCarrier will also cause it to move axially on the cylindrical supportingframe. a number of 'cou'11tei'si11kiup'` tools arranged in di1"etiiisdiver'ging fithn an axis, pinions for said tools mounted in fixed posi*tions on the said supporting frame, a commongear foi-driving saidpinions located abofve said pinion's, a shaft fo'r said gear extendingdownwardly through the said hollow supporti-ng frame, gearing locatedbelow said fr'aliie for driving said shaftand a l cam located within thesupporting frame and sli'dable axially oii' said shaft for moving saidcountersmking tools into and out of ehgag'enient with the work.

- In witness whereof, I have hereunto signed my name.

. GEORGE V. CURTIS.

yfive cents eaeh, by addressing the 'C'oninii'ssioer of Patehts,waifshiilgton, D. C.

